1. U3I File Extension
2. How to open U3I file?

2.1 Install a program that supports U3I files
2.2 Find and download proper software
1. 2.2.1 Programs that support files with U3I extension
2.3 Check the U3I file for errors

3. Similar file extensions

U3I File Extension

File type U3 Application Information Format
File developer N/A
File category Text Files
File popularity rating

How to open U3I file?

There could be multiple reasons for which the system does not support given file. In the case of U3I extension, it is probable that none of the installed programs support given file type. Therefore, user should undertake the following steps

Step 1: Install a program that supports U3I files

If an application that supports U3I files is installed on user’s system, but is not used to open such files by default, right-click on the file icon and choose "Open with" option from the menu. Next, select the proper application and check the "Always use the selected application to open this kind of files" box. The system will store this information in its registry and use the selected program to open files with U3I extension by default.

Hint for Mac OS users

For Mac OS users the procedure is analogous – open the file menu by right-clicking on the U3I file and choose "Information" option and select "Open with program" option. From the submenu select an application and click on "Change all" button.

Step 2: Find and download proper software

Inability to open U3I files may also be related to the lack of any application that supports given file being installed on the system. Should that be the case, user needs to download and install one of the following applications. Once installed, the system will automatically associate newly installed application with U3I files. If this step fails, see step 1.

Programs that support files with U3I extension

Windows

U3 Launcher

Step 3: Check the U3I file for errors

Sometimes, although relatively rarely, steps 1 and 2 might not lead to expected results. There can be several reasons for such situation to occur:

U3I file has been downloaded from the internet but for some reason it is incomplete. In such case the file should be re-downloaded and opened again.
Structure of given U3I file could be corrupted and as such the program is not able to open the file
Storage medium on which the file was stored is damaged
It is important to ascertain that the icon representing given file is not a shortcut a related U3I file no longer present in the location to which the shortcut points
If the user account has restricted access privileges it is advised to contact the system administrator or an IT expert

Similar file extensions

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3 steps to open file with U3I extension